content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package hu.akarnokd.reactive4javaflow.impl.operators;
  
  import hu.akarnokd.reactive4javaflow.*;
  import hu.akarnokd.reactive4javaflow.fused.FusedSubscription;
  import hu.akarnokd.reactive4javaflow.impl.BooleanSubscription;
  import org.junit.Test;
  
  import java.io.IOException;
  import java.util.concurrent.Flow;
  
  public class FolyamIgnoreElementsTest {
  
      @Test
      public void standard() {
          TestHelper.assertResult(Folyam.just(1).ignoreElements());
      }
  
      @Test
      public void error() {
          Folyam.error(new IOException())
                  .ignoreElements()
                  .test()
                  .assertFailure(IOException.class);
      }
  
      @Test
      public void fused() {
          TestConsumer<Integer> ts = new TestConsumer<>();
  
          Folyam.just(1)
                  .ignoreElements()
                  .subscribe(new FolyamSubscriber<>() {
                      @Override
                      public void onSubscribe(Flow.Subscription subscription) {
                          ts.onSubscribe(new BooleanSubscription());
                          FusedSubscription<Integer> fs = (FusedSubscription<Integer>) subscription;
  
                          int m = fs.requestFusion(FusedSubscription.ANY);
                          if (m != FusedSubscription.ASYNC) {
                              ts.onError(new AssertionError("Wrong fusion mode: " + m));
                          }
                          if (!fs.isEmpty()) {
                              ts.onError(new AssertionError("Not empty"));
                          }
                          Integer v;
  
                          try {
                              v = fs.poll();
                          } catch (Throwable ex) {
                              ts.onError(ex);
                              v = null;
                          }
                          if (v != null) {
                              ts.onNext(v);
                          }
  
                          fs.clear();
  
                          if (!fs.isEmpty()) {
                              ts.onError(new AssertionError("Not empty"));
                          }
  
                          try {
                              v = fs.poll();
                          } catch (Throwable ex) {
                              ts.onError(ex);
                              v = null;
                          }
                          if (v != null) {
                              ts.onNext(v);
                          }
  
                          fs.cancel();
  
                          if (!fs.isEmpty()) {
                              ts.onError(new AssertionError("Not empty"));
                          }
  
                          try {
                              v = fs.poll();
                          } catch (Throwable ex) {
                              ts.onError(ex);
                              v = null;
                          }
                          if (v != null) {
                              ts.onNext(v);
                          }
                      }
  
                      @Override
                      public void onNext(Integer item) {
                          ts.onNext(item);
                      }
  
                      @Override
                      public void onError(Throwable throwable) {
                          ts.onError(throwable);
                      }
  
                      @Override
                      public void onComplete() {
                          ts.onComplete();
                      }
                  });
  
          ts.assertEmpty();
      }
  }
  